6-2摩擦力
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
盛暐 蔣
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
此圖為推力與摩擦力的關係如圖。若以30kgw力推靜置於桌面的木塊,此時木塊與桌面間摩擦力為 (?) kgw。
20
30
30
40
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
此圖為推力與摩擦力的關係如圖。若以30kgw力推靜置於桌面的木塊,此時木塊 (?)移動。
會
不會
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
此圖為推力與摩擦力的關係如圖。若要使木塊移動,推力需大於靜摩擦力 (?) kgw。
30
40
50
60
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
此圖為推力與摩擦力的關係如圖。當木塊移動時,木塊受到的動摩擦力為 (?) kgw。
30
40
50
60
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於摩擦力的敘述,下列何者正確?
摩擦力為一種超距力
最大靜摩擦力與物重無關
桌面上物體受一水平外力F作用仍不動時,其摩擦力為F
物體未被拉動前摩擦力是固定的
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
阿滿推不動書櫃,於是他先將書本全部取下,再用小片的光滑地墊放在書櫃底下,結果可輕易推動。下列敘述何者錯誤?
推力須大於動摩擦力才能開始推動
下壓的力愈大,摩擦力也愈大
摩擦力的大小與接觸面的性質有關
無法推動書櫃時,阿滿的水平推力等於摩擦力
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有一物體重20gw,原靜置於桌上,如右圖所示,現在物體兩側分別施以水平力20gw與9gw作用,發現物體仍然靜止不動,則該物體受到的摩擦力大小為多少?
9 gw
11 gw
20 gw
29 gw
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